Itat Formation: Difference between revisions
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|''[[Kiyatriton]]''<ref>{{Cite journal|last=Skutschas|first=Pavel P.|date=2015-10-28|title=A new crown-group salamander from the Middle Jurassic of Western Siberia, Russia|url=http://link.springer.com/10.1007/s12549-015-0216-x|journal=Palaeobiodiversity and Palaeoenvironments|language=en|volume=96|issue=1|pages=41–48|doi=10.1007/s12549-015-0216-x|issn=1867-1594}}</ref> |
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|''[[Kiyatriton]]'' |
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|''K. krasnolutskii'' |
|''K. krasnolutskii'' |
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|Berezovsk coal mine |
|Berezovsk coal mine |
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|[[Salamander]] |
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|''[[Urupia]]<ref>{{cite journal|author=P. P. Skutschas & S. A. Krasnolutskii|year=2011|title=A new genus and species of basal salamanders from the Middle Jurassic of western Siberia, Russia|url=http://www.zin.ru/Journals/trudyzin/doc/vol_315_2/TZ_315_2_Skutschas.pdf|format=[[Portable Document Format|PDF]]|journal=Proceedings of the Zoological Institute RAS|volume=315|issue=2|pages=167–175}}</ref>'' |
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|''[[Urupia]]'' |
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|''U. monstrosa'' |
|''U. monstrosa'' |
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|Berezovsk coal mine |
|Berezovsk coal mine |
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|[[Goniopholididae]]<ref>{{Cite journal|last=Kuzmin|first=I.T.|last2=Skutschas|first2=P.P.|last3=Grigorieva|first3=O.I.|last4=Krasnolutskii|first4=S.A.|date=2013|title=Goniopholidid crocodylomorph from the Middle Jurassic Berezovsk Quarry locality ( Western Siberia, Russia).|url=https://spbu.pure.elsevier.com/en/publications/goniopholidid-crocodylomorph-from-the-middle-jurassic-berezovsk-q|journal=Proceedings of the Zoological Institute of the Russian Academy of Sciences|volume=317|issue=4|pages=452-458|via=}}</ref> |
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|[[Goniopholididae]] |
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|Indeterminate |
|Indeterminate |
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|Berezovsk coal mine |
|Berezovsk coal mine |
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|''[[Kileskus]]<ref name="AKI10">{{cite journal|last=Averianov|first=A. O.|author2=Krasnolutskii, S. A.|author3=Ivantsov, S. V.|year=2010|title=A new basal coelurosaur (Dinosauria: Theropoda) from the Middle Jurassic of Siberia|journal=Proceedings of the Zoological Institute|volume=314|issue=1|pages=42–57}}</ref>'' |
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|''[[Kileskus]]'' |
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|''K. aristotocus'' |
|''K. aristotocus'' |
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|Berezovsk coal mine |
|Berezovsk coal mine |
Revision as of 20:49, 22 August 2018
Itat Formation | |
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Stratigraphic range: | |
Type | Geological formation |
Unit of | Nazarovo depression |
Sub-units | Lower, Middle and Upper members |
Underlies | Tyazhin Formation |
Overlies | Ilan Formation |
Thickness | At least 100 m |
Lithology | |
Primary | Sandstone, Mudstone, Coal |
Other | Siltstone |
Location | |
Coordinates | 55°42′N 89°12′E / 55.7°N 89.2°E |
Approximate paleocoordinates | 58°12′N 86°42′E / 58.2°N 86.7°E |
Region | Siberia |
Country | Russia |
Extent | Krasnoyarsk krai |
The Itat Formation is a geologic formation in western Siberia. It was deposited in the Bajocian to Bathonian stages of the Middle Jurassic.[1] Dinosaur remains are among the fossils that have been recovered from the formation, including the proceratosaurid Kileskus, caudata Urupia monstrosa, therapsida Amphibetulimus, Itatodon, Simpsonodon, Hutegotherium, Sineleutherus and dryolestidae Anthracolestes.[2]
Locality
Most of the fossils were found in the overburden of Berezovsk coal mine, which is located in southern Krasnoyarsk Krai near the border with Kemerovo Oblast. the deposit is stratigraphically located in the upper member of the formation. The fossils were largely obtained by screenwashing of the debris. 10-15 tons of material have been processed so far.
Paleobiota
Fish
Fish of the Itat Formation | ||||||
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Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Hybodus | Indeterminate | Berezovsk coal mine | Upper Member | Partial tooth | ||
Acipenseriformes | Indeterminate | Berezovsk coal mine | Upper Member | Scales | ||
Amiiformes | Indeterminate | Berezovsk coal mine | Upper Member | "abundant vertebrae,jaws and vomer fragments,as well as isolated teeth,and numerous isolated rhomboidal scales" | ||
Dipnoi | Indeterminate | Berezovsk coal mine | Upper Member | One complete upper tooth plate, several tooth plate fragments | ||
Palaeonisciformes | Undescribed | Berezovsk coal mine | Upper Member | Many partial skeletons | Similar to Palaeoniscinotus and Pteroniscus |
Amphibians
Amphibians of the Itat Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
?Eodiscoglossus[3] | Indeterminate | Berezovsk coal mine | Upper Member | atlantal centrum | Frog | |
Kiyatriton[4] | K. krasnolutskii | Berezovsk coal mine | Upper Member | dentary, atlantes,trunk vertebrae and fragmentary cranial and postcranial bones | Formerly known as “Berezovsk salamander B” | Salamander |
Urupia[5] | U. monstrosa | Berezovsk coal mine | Upper Member | dentary, femur, an incomplete atlas,an anterior fragment of the left dentary,and fragments of trunk vertebrae | Salamander |
Turtles
Turtles of the Itat Formation | ||||||
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Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Annemys | Indeterminate | Berezovsk coal mine | Upper Member | |||
Testudines | Indeterminate | Berezovsk coal mine | Upper Member | 3 distinct taxa |
Lepidosauromorphs
Lepidosauromorphs of the Itat Formation | ||||||
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Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Lepidosauromorpha | Indeterminate | Berezovsk coal mine | Upper Member | several fragments of dentaries and maxillae | Basal form similar to Marmoretta | |
Scincomorpha | Indeterminate | Berezovsk coal mine | Upper Member | fused premaxillae and two dentary fragments additionally several fragmentary maxillae and dentaries | Two distinct taxa, one of which is two times smaller than the other. |
Choristoderes
Choristoderes of the Itat Formation | ||||||
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Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Cteniogenys | Indeterminate | Berezovsk coal mine | Upper Member | skull roof bones, maxillary and dentary fragments, vertebrae, ribs |
Pterosaurs
Pterosaurs of the Itat Formation | ||||||
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Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
?Rhamphorhynchidae | Indeterminate | Berezovsk coal mine | Upper Member | numerous isolated teeth and very rare bone fragments |
Crocodyliformes
Crocodyliformes of the Itat Formation | ||||||
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Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Goniopholididae[6] | Indeterminate | Berezovsk coal mine | Upper Member | several dozens of isolated teeth, osteoderms, and a few cranial fragments |
Non Avian Dinosaurs
Non Avian DInosaurs of the Itat Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Kileskus[7] | K. aristotocus | Berezovsk coal mine | Upper Member | Holotype description: "premaxilla,maxilla,a mandible fragment,and several limb bone parts" referred: cervical and caudal vertebrae and numerous isolated teeth | Proceratosaurid | |
Heterodontosauridae | Indeterminate | Berezovsk coal mine | Upper Member | Isolated maxillary and dentary teeth | ||
Mamenchisauridae | Indeterminate | Berezovsk coal mine | Upper Member | numerous isolated teeth and two platycoelous posterior caudal vertebrae | Sauropod | |
Stegosauria[8] | Indeterminate | Berezovsk coal mine | Upper Member | Fragmentary skeletons of at least two individuals |
Tritylodontids
Tritylodontids of the Itat Formation | ||||||
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Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Stereognathus[9] | Indeterminate | Berezovsk coal mine | Upper Member | Upper and lower postcanine teeth |
Mammaliaformes
Mammaliaformes of the Itat Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Amphibetulimus | A. krasnolutskii | Berezovsk coal mine | Upper Member | |||
Amphitherium | Indeterminate | Berezovsk coal mine | Upper Member | Upper and lower molars and an edentulous dentary fragment | ||
Anthracolestes | A. sergeii | Berezovsk coal mine | Upper Member | isolated teeth and edentulous dentary fragments | Dryolestid | |
Hutegotherium | H. yaomingi | Berezovsk coal mine | Upper Member | Docodontan | ||
Itatodon | I. tatarinovi | Berezovsk coal mine | Upper Member | Docodontan | ||
Simpsonodon | S. sibiricus | Berezovsk coal mine | Upper Member | Docodontan | ||
Sineleutherus | S. issedonicus | Berezovsk coal mine | Upper Member | Haramiyidan | ||
Eutriconodonta | Indeterminate | Berezovsk coal mine | Upper Member | One large tooth and several tooth fragments | Large tooth similar to Gobiconodon | |
Multituberculata | Indeterminate | Berezovsk coal mine | Upper Member | molariforms |
See also
References
- ^ Ivantsov, S. V.; Bystritskaya, L. I.; Krasnolutskii, S. A.; Lyalyuk, K. P.; Frolov, A. O.; Alekseev, A. S. (2016-09). "Middle Jurassic continental biota and paleolandscape in the Dubinino locality (Sharypovo area, Krasnoyarsk krai)". Stratigraphy and Geological Correlation. 24 (5): 486–502. doi:10.1134/s0869593816050038. ISSN 0869-5938.
{{cite journal}}
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(help) - ^ "Middle Jurassic vertebrate assemblage of Berezovsk coal mine in western Siberia (Russia)". Global Geology. 19 (4): 187–204. 2016. doi:10.3969/j.issn.1673-9736.2016.04.01.
- ^ Skutschas, Pavel P.; Martin, Thomas; Krasnolutskii, Sergei A. (2016-02-24). "First Jurassic frog from Siberia, Russia". Journal of Vertebrate Paleontology. 36 (3): e1101376. doi:10.1080/02724634.2016.1101376. ISSN 0272-4634.
- ^ Skutschas, Pavel P. (2015-10-28). "A new crown-group salamander from the Middle Jurassic of Western Siberia, Russia". Palaeobiodiversity and Palaeoenvironments. 96 (1): 41–48. doi:10.1007/s12549-015-0216-x. ISSN 1867-1594.
- ^ P. P. Skutschas & S. A. Krasnolutskii (2011). "A new genus and species of basal salamanders from the Middle Jurassic of western Siberia, Russia" (PDF). Proceedings of the Zoological Institute RAS. 315 (2): 167–175.
- ^ Kuzmin, I.T.; Skutschas, P.P.; Grigorieva, O.I.; Krasnolutskii, S.A. (2013). "Goniopholidid crocodylomorph from the Middle Jurassic Berezovsk Quarry locality ( Western Siberia, Russia)". Proceedings of the Zoological Institute of the Russian Academy of Sciences. 317 (4): 452–458.
- ^ Averianov, A. O.; Krasnolutskii, S. A.; Ivantsov, S. V. (2010). "A new basal coelurosaur (Dinosauria: Theropoda) from the Middle Jurassic of Siberia". Proceedings of the Zoological Institute. 314 (1): 42–57.
- ^ Averianov, A.O.; Krasnolutskii, S.A. (2009). "Stegosaur remains from the Middle Jurassic of West Siberia". Proceedings of the Zoological Institute RAS. 313 (2): 153–167.
- ^ Averianov, Alexander O.; Martin, Thomas; Lopatin, Alexey V.; Schultz, Julia A.; Skutschas, Pavel P.; Rico, Schellhorn; Krasnolutskii, Sergei A. (2017-09-03). "A tritylodontid synapsid from the Middle Jurassic of Siberia and the taxonomy of derived tritylodontids". Journal of Vertebrate Paleontology. 37 (5): e1363767. doi:10.1080/02724634.2017.1363767. ISSN 0272-4634.